Dent for weaving reeds



,9 I J. P. J. LUSSARD! 2,434,114

v DENTS FOR WEAVING REED-S Filed March 21, 1946 I Z 5% v QZQ ;.3

INVENTOR M ATTORNEY Patented Jan. 6, 1948 DENT FOR WEAVING REEDS John I. J. Lussardi, "Roebuck, S. 0., assignor to Andrews Company, Spartanburg, S. 0., a copartnership Application March 21, 1946', SerialNo. -"6 6;035

adjacent dents,.in order to prevent the yarn from ibeing .cut or injured by the sharp edges of the dents.

The invention consists of a dent having a central bead extending longitudinally the length of the bead and disposed transversely centrally of the dent, the bead having a convex surface extending from its dent to the dent adjacent thereto. The invention also contemplates as a modified form of dent, such an improved dent having in addition to the convex dent at one side of the dent, a concave depression also extending along the operative length of the dent, the curvature of the concave depression at one side of the dent being substantially concentric with the curvatur of the convex bead at the other side of the dent. The curved bead directs the path of the yarn between two adjacent dents in such a way that the path of the yarn does not encounter any of the edges of the dent.

The invention will be further described, embodiments thereof shown in the drawings, and the invention will be finally pointed out in the claims.

In th accompanying drawings,

Fig. 1 is a fragmentary front view of the improved reed;

Fig. 2 is a vertical section taken on line 2-2 of Fig. 1;

Fig. 3 is a horizontal section taken on line 3-3 of Fig. 1;

Fig. 4 is an enlarged cross-section of a modified form of the dent of Fig. 3; and

Fig. 5 is a transverse section of two adjacent dents, diagrammatically showing the action of the yarn without encountering the edges of the dents.

Similar characters of reference indicate corresponding parts throughout the various views.

Referring to the drawings, the improved dent I0 consists of dent body member I I having at one side extending longitudinally throughout its length, a convex bead I2. This bead I2 forms a constricted passage I3 with its adjacent dent. These dents III are spaced and supported by the upper and lower backs I4 and I5, the dents protruding beyond the backs, usually of wood, as at Illa, in a manner well known. An end member I6 is provided for the reed.

The improvement consists of a new form of dent over the customary dent having parallel sides. The known dent is of rectangular crosssection with the larger sides parallel with each other. When warp yarn passes through such dents between the larger parallel sides, knots and gouts on the yarn catch on the sharp edges of the dents and break 'theiyarn andstop'the loom.

In this improved dent, with the projecting bead I2, greater air space between the edges of dents at both front and back of the improved reed permits the knots and gouts to enter and be gradually reduced as they approach the narrowest space at the top of the bead l2 and pass through the constricted passage I 3 formed by the bead I2 and the rear wall Ila of the adjacent dent. This eliminates to a great degree the loss of production caused by m stoppage. Considerable friction on the yarn is eliminated by reason of its being in contact with dents only at a point at the top of bead and at the opposed portion of the rear wall lIa.

As a modification, which has also given satisfaction, each dent I0 has a convex bead I2 as before explained on one of its larger sides, and has a concave rill or depression 20 at its other larger side. The peak of each convex bead I2 cooperates with the valley of the adjacent dent, and forms a constricted sinuous passage between the adjacent larger sides of the contiguous dents. The curvature of the convex bead and the curvature of the concave depression are substantially concentric.

The diverted passage produces a resultant path for the knots, which prevents them from contacting with the sharp ed es ll of the dents, as diagrammatically shown in Fig. 5. The entrance path is shown by the arrow I8; this is diverted as shown by arrow I9. The resultant path is shown by arrow 20, away from the edge I1.

The distance between the peak I2a of the bead (in Fig. 5) and the opposed surface Ila, is about equal to the distance between the straight sides of the known dents. In consequence, the space IIa between the edges of two adjacent dents is larger than the known space. As far as the vertical lengths of the beads along the dents are concerned, it need only be for the operative length of the yarn, though in the embodiments, the beads extend the entire length of the dents, simplifyin the spacing of the dents in the backs.

I have described several forms of my invention, but obviously various changes may be made in the details disclosed Without departing from the spirit of the invention as set out in the following claims.

I claim:

1. In a weaving reed having an upper and a lower back, the combination of adjacent dents, each having at one side thereof, a convex bead disposed substantially centrally thereof projecting towards its adjacent dent, the space between the peak of the bead and the surface of the adjacent dent being the yarn space and the space between the adjacent edges of the dents being larger than the yarn space, and said adjacent dent having a concave depression of a curvature substantially that of the curvature of said convex bead.

2. A dent for weaving reeds comprising a dent having a. substantially rectangular cross-section, and a curved longitudinal bead spaced from either side edge of the dent extending from one of its larger sides, the dent having contiguous transverse straight sides at either end of the curved bead.

3. A dent for weaving reeds comprising a dent having a substantially rectangular cross-section, and a curved longitudinal bead spaced from either side edge of the dent extending from one of its larger sides, the dent having contiguous transverse straight sides at either end of the curved bead, and a concave depression at the other larger side, having a curvature substantially concentric with the curvature of the bead, said concave depression being equally spaced transversely from the edges of the dent, the dent having contiguous transverse straight sides at either end of the concave depression.

4. In a weaving reed having an upper and a lower back, the combination of adjacent dents, each having at one side thereof, a convex longitudinal bead spaced from either side of the dent disposed substantially centrally thereof projecting towards its adjacent dent, the dent having contiguous transverse straight sides at either end of the curved bead, the space between the peak of the bead and the surface of the adjacent dent being the yarn space and the space between the adjacent edges of the dents being larger than the yarn space.

JOHN P. J. LUSSARDI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number 

